Expansive pump-plunger.



G. L. PARKER.

EXPANSIVE PUMP PLUNGER.

APPLICATION IILED 00125, 1911.

Patented May 28, 1912.

6x60 37166. Fay! solid portions of the walls of the tube 3 and 10. i

The upper end of the tube 3 and the cor responding portion of the collar are her eled upwardly, as indicated at 15 to form a con'iparativelv sharp edge at the upper end of the outer surface of the eolla r 9. The plunger is carried by a hollow rod 16. which may be screwed into the interior of the cage 6, and this rod carries a valve 17. but the construction of the plunger rod to and valve '17 do not enter into the present in vention, being fully covered in the aforesaid application, N 5. $5 7,056, wherein there is also disclosed but not claimed a plunger in many respects similar to the plunger forming the snbjectanatter ot the present application.

The plunger herein diselosed is an elongated structure, and is designed For use. in deep wells, especially where sand ma v be present, and the elongated slits provide for the expansion of the phuigz'er so as to make a tight yet free lit with the inner walls of the. pump barrel. The disposition of the slits 1'2 and l3 permits the, simultaneous expa nsion of the inner l( '1 with the intermediate sleeve 10 against the inner wall of the outer sleeve or tube :2. and the slits 1lpermit the (Xpill'lRlF-l'l ot' the outer sleeve or tube "2 without eommnnieation with the interior oi" the lunger. and the sleeves Q and C3 therebv ct'instituting an elastic body, which will treel expand without any liability of sand, or other deleteri-- ous matter finding its way between the two sleeves '2 and 3. and which will a so prevent the entrance ol sand or grit or other ma.- terial liable to cause wear between the outer walls of the plunger and the inner wall of the pump barrel. Any sand. which may cling to tlie'i'nner wall of the pump barrel, is removed bv the beveled edge 15 or" the collar 8 on the upward stroke of the plunger.

By slitting or splitting the intermediate or filling sleeve 10 both tube or sleeves and 3 may expand freely without interference from the sleeve 10. and the three sleeves are always maintained in such eh'ise relation that there is no chan e of sand or grit entering between the sleeve 3 and the sleeve 10, orbetween the sleeve 10 and the sleeve llloreover, there no necessity of the plunger walls having an elastic outward tendency since in deep wells the internal pressure is heavy, sometimes amountiire to as much as nine hundred pounds to the square inch, the plunger being of considerable length and must fit the walls of the pump barrel perfectly in every respect, for otherwise the great pressure would cause the fluid to leak liacl; both between the plunger and the barrel and into the slots or slits.

Having thus fully described my invention, what I claim as new and desire to secure by la'liters latent, iszl. In a pump, a pump barrel and a planger coinposed of two illl'eillttilig tubular members lattmallv expansible, the plunger being provided with a packing intermediate of the two tubular parts, and the inner Inemher and packing-being provided with matching passages to provide for the action of the weight of liquid above the plunger directly on the outer nui-mber.

:2. in a pump, a pump barrel and a plunger composed of an inner split memb r and an outer split member with an intermediate split parking all secured together near one end the inner m'emluu' and packing being constructed for the direct action of liquid above the plui'iger upon the-outermember to expand the latter.

in a pump, a pump barrel and a plungeicomposed of two intertitting tubular members having longitudinal slits for permillingthe plunger to expand into engagement. with the barrel. the plunger being provide 'l with a packingt'or covering the slits in the outer one of. the tubular members.

lo a pump. a pump barrel, and a plunger composed of two inter-fitting tubular members having", lOtllitl llI1zll slits for permitting the plunger to expand into engagement with the barrel. the slits of one member being staggered with respectto thoseof the other, said plunger having an elastic sleeve interposed between the members to expand therewith and cover the slits of the outer member.

ln av pump, a pump barrel, and a plunger composed of two intertitting tubular members having longitudinal slits for permitting the plui ger to expand into engagement with the barrel, the slits of one member being staggered with. respect to those of the other, said plunger having an elastic sleeve. interposed between the members to expand therewith and to cover the slits of the outer member, the sleeve being also provided with longitudinalslits matching those of the inner sleeve.

6. in a pump, a pump. barrel, and a plunger composed ot two interlitting tubular n'a'anbers having slits for permitting the plunger to expand into engagement with the barrel, the slits of one member being staggered with respect to those of the other. and said phuiger having a flexible sleeve interposed between the members to expand therewith and provided with passages matching the slits in the inner member, said passages being arranged out of linewith the slits in the outer member.

7. ln a pump, a plunger comprising an outer and an inner member and an intermediate packing sleeve all connected. to- Q tfllttl' at one end. the inner and outer members and the intermediate parking sleeve opening to the inner surface of the outer member.

8. In a pump, a plunger consisting of an innerr'and an outer tubular sleeve and an intermediate packing sleeve all secured together at one end, the inner sleeve extending out of the end of the outer sleeve remote from the secured ends and there being of substantially the same diameter as the outer member and beveled toward the outer edge, the said sleeves being ,expansible and the inner sleeve and packing sleeve being proting the liquid above the plunger whenin use to act directly on the outer sleeve.

9.111epnmp, a pump barrel, and a plu'nger therein consistin of two telescoping tubular members, the inner member extending out of the upper end of the outer member and there of substantially the same diameter as the outer member and also beveled toward the upper edge, both members being split longitudinally at their upper ends and rigidly secured together at their lower ends and the plunger being provided with an elastic packing sleeve disposed between the two members.

10. In a pum a pump barrel, and a plunger mounte therein and consisting of an outer tubular member provided with longitudinal slits extending downwardly from the upper end toward and terminating short of the lower end, an inner member slit longitudinally and arranged with its slits in staggered relation with those of the outer memher, the lower end of the inner member being rigidly secured to the outer member, and a tubular packing sleeve of elastic material disposed between the members and also provided with longitudinal slits matching the slits of the inner member, said packing sleeve covering the slits of the outer member at the inner wall thereof. 11. ."In' a pump, a pump barrel, and an expansible plunger therein comprising an outer member provided with a plurality of longitudinal slits extending from its upper end, an --i nner member fitted within the outerinembei taiifd enlarged at its upper end 1 vided with matching openings ,for permitto forfmiashoulder against which the upper end of the outer members fits, said inner member being of less external diameter than the internal diameter of the outer member to form a packing space closed at its upper end by the enlarged portion of the inner member, said inner member being slit longitudinally and. secured to the outer member with its slits in staggered relation to those of the outer member, and an elastic sleeve in the packing space and also provided with longitudinal slits matching those of the inner member, said elastic "sleeve covering the slits of the outer member at the inner wall thereof.

In testimony, that I claim the foregoing as my own, I have hereto my signature in the presence of two witnesses.

CLARENCE L. PARKER.

' M. J. \VEBB. 

